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Acutime 2000 Synchronization Kit User Guide C-9
C NMEA 0183
C.4.5 RMC – Recommended Minimum Specific GPS/Transit
Data
The RMC message contains the time, date, position, course, and
speed data provided by the GPS navigation receiver. A checksum is
mandatory for this message and the transmission interval may not
exceed two seconds. All data fields must be provided unless the data
is temporarily unavailable. Null fields may be used when data is
temporarily unavailable.
$GP RMC,hhmmss.s,A,llll.lll,a,yyyyy.yyy,a,x.x,x.x,
xxxxxx,x.x,a*hh
<CR><LF>
Table C-7 RMC – Recommended Minimum Specific
GPS / Transit Data Message Parameters
Field # Description
1 UTC of Position Fix.
2 Status: A = Valid, V = navigation receiver warning
3,4 Latitude, N (North) or S (South).
5,6 Longitude, E (East) or W (West).
7 Speed over the ground (SOG) in knots
8 Track made good in degrees true.
9 Date: dd/mm/yy
10,11 Magnetic variation in degrees, E = East / W= West
hh Checksum (Mandatory for RMC)